EP 1810402 A4 20110928 - METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER
Title (en)
METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER
Title (de)
VERFAHREN UND VORRICHTUNG ZUR SCHÄTZUNG DER SCHRITTGRÖSSE EINES ADAPTIVEN ENTZERRERS
Title (fr)
PROCEDE ET APPAREIL D'ESTIMATION DE LA TAILLE DE PAS D'UN EGALISEUR ADAPTATIF
Publication
Application
Priority
- US 2005037602 W 20051020
- US 62586904 P 20041108
- US 23846905 A 20050929
Abstract (en)
[origin: US2006098766A1] A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another transceiver. The step-size estimator includes a speed estimator, a signal-to-noise ratio (SNR) averager and a step-size mapping unit. The speed estimator is used to estimate the apparent speed of the channel, (i.e., the observed and/or measured rate of change of the channel impulse response). The SNR averager generates a common pilot channel (CPICH) SNR estimate. The step-size mapping unit uses the speed estimate and the CPICH SNR estimate to generate a step-size parameter, mu, and a filter taps leakage factor parameter, alpha, used by the adaptive equalizer to update the filter tap coefficient.
IPC 8 full level
H04L 25/03 (2006.01)
CPC (source: EP KR US)
H03K 5/159 (2013.01 - KR); H04L 25/03 (2013.01 - KR); H04L 25/03019 (2013.01 - EP US); H04L 65/00 (2013.01 - KR); H04B 2201/70701 (2013.01 - EP US); H04L 2025/03687 (2013.01 - EP US)
Citation (search report)
- [Y] EP 0804007 A2 19971029 - OKI ELECTRIC IND CO LTD [JP]
- [XAY] BAUM K L ET AL: "A parallel adaptive filter structure for digital mobile radio applications", VEHICULAR TECHNOLOGY CONFERENCE, 1995 IEEE 45TH CHICAGO, IL, USA 25-28 JULY 1995, NEW YORK, NY, USA,IEEE, US, vol. 1, 25 July 1995 (1995-07-25), pages 64 - 67, XP010166896, ISBN: 978-0-7803-2742-9, DOI: 10.1109/VETEC.1995.504830
- [A] HARTENECK M ET AL: "Practical implementation aspects of MMSE equalisation in a 3GPP HSDPA terminal", VEHICULAR TECHNOLOGY CONFERENCE, 2004. VTC 2004-SPRING. 2004 IEEE 59TH MILAN, ITALY 17-19 MAY 2004, PISCATAWAY, NJ, USA,IEEE, US, vol. 1, 17 May 2004 (2004-05-17), pages 445 - 449VOL.1, XP010764837, ISBN: 978-0-7803-8255-8, DOI: 10.1109/VETECS.2004.1387992
- See references of WO 2006052404A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2006098766 A1 20060511; US 7496138 B2 20090224; CA 2586703 A1 20060518; CN 101288228 A 20081015; CN 101288228 B 20101006; EP 1810402 A2 20070725; EP 1810402 A4 20110928; EP 2602963 A1 20130612; JP 2008519557 A 20080605; KR 100912055 B1 20090812; KR 20070085943 A 20070827; KR 20070094973 A 20070927; MX 2007005532 A 20070713; NO 20072745 L 20070802; TW 200627786 A 20060801; TW 200717998 A 20070501; TW 200943693 A 20091016; TW I296461 B 20080501; TW I433449 B 20140401; US 2009129458 A1 20090521; US 7724817 B2 20100525; WO 2006052404 A2 20060518; WO 2006052404 A3 20070222
DOCDB simple family (application)
US 23846905 A 20050929; CA 2586703 A 20051020; CN 200580037815 A 20051020; EP 05814908 A 20051020; EP 13157842 A 20051020; JP 2007540330 A 20051020; KR 20077012988 A 20070608; KR 20077018723 A 20070816; MX 2007005532 A 20051020; NO 20072745 A 20070530; TW 94136994 A 20051021; TW 95115811 A 20051021; TW 98100266 A 20051021; US 2005037602 W 20051020; US 36017109 A 20090127